The zero joint, what is it?

At edgebanding, the term zero joint refers to a processing result in which the joint between the panel surface and the edge material is not visible to the mere eye. A generally applicable standard for the zero joint does not yet exist (as of August 2020), but there is an unofficial technical method for the evidence of the zero joint, which is referred to as the graphite test. In this test, graphite powder is spread on the plate and rubbed over the joint. If no joint appears after rubbing, the test is passed. For the furniture user, this means that the joint does not collect dirt in everyday use and remains invisible.

The first patent for zero joint bonding was registered in 2001 for the kitchen manufacturer Bulthaup, which had developed the laser process in collaboration with the edge manufacturer Rehau and the machine manufacturer IMA. However, laser technology did not reach market maturity until eight years later. At the trade fair LIGNA 2009, IMA presented its first production-ready machine with CO2 laser and HOMAG the first production-ready machine with diode laser. Since then, further technical methods have been developed for industrial and craft manufacturing.

Zero joint technologies explained in an understandable way

chapter 1: mode of operation

chapter 2: edge band material

chapter 3: functional layer

chapter 4: overview zero joint technologies

chapter 5: laser technology

chapter 6: hot air technology

chapter 7: near infrared technology

chapter 8: microwave technology

chapter 9: plasma technology

chapter 10: hydrogen technology

chapter 11: conditions for a successful zero joint

chapter 12: zero joint technology for craftsmen

chapter 13: zero joint, a critical view